ramips: mt76x8: cudy TR1200 v1 add previous dts compatible

Add old dts compatible "cudy,tr1200" to SUPPORTED_DEVICES list to alow
"force-less" sysupgrades from the cudy installation image and from old
installations using the previous dts compatible.

Fixes: d780d53 ("ramips: mt76x8: sync Cudy TR1200 v1 naming")
Fixes: openwrt#22640

Signed-off-by: Mario Andrés Pérez <mapb_@outlook.com>

Author: map-b

target/linux/ramips/image/mt76x8.mk

@@ -239,7 +239,7 @@ define Device/cudy_tr1200-v1
   DEVICE_VARIANT := v1
   DEVICE_PACKAGES := kmod-usb2 kmod-usb-ohci kmod-usb-ledtrig-usbport \
 	kmod-mt7615e kmod-mt7663-firmware-ap
-  SUPPORTED_DEVICES += R46
+  SUPPORTED_DEVICES += cudy,tr1200 R46
 endef
 TARGET_DEVICES += cudy_tr1200-v1